westcott



J. D. WESTCOTT, Ol" WATERFORD, PENNSYLVANIA.

Letters Patent N4. 81,665, dated August 25, 1888.

IMPROVE!) PUMP-HST() @he Srlgetule nismo ts it this: 3mm Eaten! watnoting nari nf tit time.

TO ALL WIIOM IT MAY CONCERN:

llc it known that l, J. D. Wsstco'rt', of Waterford, in the county ofErie, and Stste of ?snnsylvsnis, have invented n eertsin nen' ond nsel'lImprovement in Double-Acting Pumpistons; and I de hereby deelsro thstthofollowing is a inll nml exact description thereof, reference being hadto the accompanying drawings, makin g port of this spccicstion, inwhich- Fignrs l is n control vertical section of my improved piston,situated in the pump-cylinder.

Figure 2, o pion ol' tho piston detached.

Figure 3, n view showing s modicotion.

Like letters of reference indicnte corresponding psrts in sli the gures.

My invention consista in combining with s hollow piston-hond, coveringthe induction-passage to the pipe, two cnp-shsped shoulders or stops, oshereinafter set forth.

In the drawings, A indicates tho hollow piston-rod or pipe; B B, thecup-shaped shoulders or stops secured thereon, und 0 the hollowpistondlssd, which plays between the shoulders or stops, ond admitswater slternstely on opposite sides.

n The shoulders or stops orc piston-head, is meds to enclose the may be.The top ond bottom ol the piston-heed, next the pipo, ore pro arrangedwith the caps a a facing noch other. The hollow interior, e, oi' theinduetionapening, b, of the pipo at ell times, sud in whstevr positionit vided with ports d d, leaving bearings yf f to keep the piston inplcce in the pipe.

Several devices srs already hnovm in which the piston-heed slidesbetween shoulders to admit the water alternately on opposite sides. Minodi'ers from them in t'lo particulars: first, the piston-hoed is msdehollow, and oneloses the indnction-opening in ell positions; and second,the stops B src msdn in the form of cops, to receive the iriipsct of thepiston-head.

The hollow piston-hond enclosing the induction-opening serves os n.reserve-cheminer, so thot nt the runnen'. of reversing the motion. thedow is moro sensitive toward tbe pipe. it also serves, at that moment,es n. check to the csoape ol' water outward, since the impulse islateral tonni-d the closed sides. It furthermore admits oi' the openingbeing ent directly in the body of the pipe, without any collar or otheraddition to the letter.

1n addition to the above, the water hns ot all times n frcs occess toopening b; therefore tho piston-hood requires less ploy between theshoulders than when the noter is admitted outside the hond.

The stops B B, holding n reserve of vretcr in the cops n a, formcushions, ns it were, for the impact of the piston-hond, whereby thegrcnt shock ond rolling nre obvisted, ond tho parts nre less liable tohreaknge.

Il desired, o bnlh or secondary heed mcy be ottsehod to the pipe, insidethe piston-hosd, os shown in g. 3, in which ense the indnetiowopcning isnot in tho pipo but in the bulb.

Whot I claim os my invention, and desire to secure by Letters Potent,is- Tho hollen' piston-hond C, enclosing the induction-opening b in slipositions, ond tho cup-shupcdstops 1J Il, oting in the moonen ond forthe puroctng in connection therewith, the whole srrenged o described,and opor poso spociiicd. l

In witness whereof, I have hereunto signed my nemo in tho presence oftwo subscribing witnesses.

. WESTGOTT.

Witnesses:

8. B. Basson, F. Usutzv..

